+ memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch added to mm-hotfixes-unstable branch

+ memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: memcg: fix slab accounting in refill_obj_stock() trylock path
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Hao Li <hao.li@linux.dev>
Subject: memcg: fix slab accounting in refill_obj_stock() trylock path
Date: Thu, 26 Feb 2026 19:51:37 +0800

In the trylock path of refill_obj_stock(), mod_objcg_mlstate() should use
the real alloc/free bytes (i.e., nr_acct) for accounting, rather than
nr_bytes.

Link: https://lkml.kernel.org/r/20260226115145.62903-1-hao.li@linux.dev
Fixes: 200577f69f29 ("memcg: objcg stock trylock without irq disabling")
Signed-off-by: Hao Li <hao.li@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memcontrol.c~memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path
+++ a/mm/memcontrol.c
@@ -3086,7 +3086,7 @@ static void refill_obj_stock(struct obj_
 
 	if (!local_trylock(&obj_stock.lock)) {
 		if (pgdat)
-			mod_objcg_mlstate(objcg, pgdat, idx, nr_bytes);
+			mod_objcg_mlstate(objcg, pgdat, idx, nr_acct);
 		nr_pages = nr_bytes >> PAGE_SHIFT;
 		nr_bytes = nr_bytes & (PAGE_SIZE - 1);
 		atomic_add(nr_bytes, &objcg->nr_charged_bytes);
_

Patches currently in -mm which might be from hao.li@linux.dev are

memcg-fix-slab-accounting-in-refill_obj_stock-trylock-path.patch